On Mythic difficulty, breaking Surekian Tethers inflicts damage to all players.
On Heroic difficulty, breaking Surekian Tethers inflicts damage players tethered.
On this difficulty, Infested Spawn's initial damage affects players in a radius around the marked target.
On Heroic difficulty, Dark Viscera spews from the bursting player.
Is that Zeratul? Warcraft and Starcraft universes are the same, confirmed.